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ISA Bus Eight and Sixteen Channel 12-Bit Analog Output Cards


  • Eight or Sixteen independent double-buffered analog outputs
  • 12-Bit resolution
  • Six Voltage Output Ranges: 0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, ±10V
  • Individual range selection per channel
  • Channel-by-channel or simultaneous update modes
  • Outputs held at zero volts at power-up
  • Setup and calibration software included
  • Designed, made, supported, and manufactured in the USA
Models DA12-08 and DA12-16 are full-size cards that can be installed in any long I/O slot of PC-AT class computers. The cards provide eight and sixteen 12-bit- resolution analog outputs respectively at a 37-pin male Sub-D connector. Analog output channels can be individually switch configured for any of the following voltage ranges:
  • 0 to +2.5V
  • 0 to +5V
  • 0 to +10V
  • ±2.5V
  • ±5V
  • ±10V
Type AD7237 double-buffered dual DAC chips are used. Data are transferred from the computer into outer registers a byte at a time and transferred into inner registers a word at a time. The analog outputs can be updated either independently or simultaneously. In order to prevent inadvertent outputs at system power-on, the reference voltage to all DAC's is set to zero volts. Then, after all DAC's have been loaded with the desired initial values, a software command can be used to switch this reference voltage to its nominal value. Similarly, a software command can be used at any time to set the reference voltage to zero causing all DAC outputs to be zero volts.

Available Reference Manuals

Available Software Downloads

Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.


Analog Outputs

  • Resolution: 12 bits (0 to 4095 decimal)
  • Channels: Eight or Sixteen, Independent
  • Voltage Output Ranges at 5mA max.:
    0-2.5 VDC, 0-5 VDC, 0-10 VDC, ± 2.5 VDC, ± 5.0 VDC, ± 10.0 VDC
  • Short-circuit current: 25 mA maximum
  • Output resistance: Less than 0.1 ohm

Digital to Analog Converter

  • AD7237 monolithic chip, double buffered
  • Relative Accuracy: ± ½ LSB
  • Linearity: ± ½ LSB integral non-linearity over rated temperature range
  • Monotonicity: Guaranteed over operating temperature range
  • Settling time: 8 usec to 1 LSB for full scale step input
  • Offset Temperature Drift:
    ± 1 ppm/°C typ., ± 3 ppm/°C max.
  • Gain Temperature Drift:
    ± 15 ppm/°C typ.
  • Data Format: Right-justified, two bytes (8LSB's and 4MSB's)


  • Operating Temperature: 0 to +60 degree C.
  • Storage Temperature: -20 to +85 degree C.
  • Humidity: 5% to 95% non condensing.
  • Size: 13.130 inches. Install in a full-size slot.

Power Requirements

  • +5 VDC at 250 mA max.
  • +12 VDC at 310 mA max.
  • -12 VDC at 150 mA max.

Regulatory Compliance

  • This product is in full compliance with CE requirements.

ModelPrice (USD)

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